An object of the utility model is to provide a mounting platform car for space optimizing apparatus of distribution device building is particularly useful for arranging and installing indoor power equipment. To having carried out arranging of earlier stage in the computer lab of equipment requiring installation, improved the efficiency of equipment fixing and transport, improved the utilization ratio of the interior space. In order to realize the purpose, a mounting platform car for space optimizing apparatus of distribution device building's mounting platform car, including the installation panel, spherical gyro wheel is installed to installation panel bottom, the installation panel is equipped with reinforcing pile all around, and the reinforcing pile below is equipped with can dismantleplug -in components, can dismantle plug -in components and be used for fixed turn to gyro wheel or fixed block. The utility model discloses the building that the cooperation has space optimizing apparatus uses. Can provide a machine assembly's space through the mounting platform car, will fix the equipment propelling movement to fixed position by the mounting platform car after the assembly finishes.